Biomedical subjects

W J Groh

Publications and source records attributed to W J Groh.

22 records · Page 2Linked to original sources

PubMed1994

Bilateral internal mammary-to-pulmonary artery fistulas after a coronary operation.

A case of bilateral internal mammary artery-to-pulmonary artery fistulas presenting as recurrent angina late after revascularization is described. Objective evidence of ischemia was documented using stress electrocardiography and thallium-201 scintigraphy. The patient was managed conservatively to date with medical therapy. Fistula formation may complicate internal mammary artery bypass grafting and should be considered as a potential cause of recurrent angina.

Angina Pectoris↗

PubMed1985

Sonographic measurement of gallbladder volume.

Sonographic images of the gallbladder enable satisfactory approximation of gallbladder volume using the sum-of-cylinders method. The sum-of-cylinder measurements, however, are moderately cumbersome and time consuming to perform. In this investigation, in vitro and in vivo testing was done to determine that a simple ellipsoid method applied to sonographic gallbladder images yields reasonable volume approximations that are comparable to the volumes calculated by the sum-of-cylinders method. Findings from a water-bath experiment showed that measurement of gallbladder volume by the ellipsoid method closely approximated the true volume with a mean difference of about 1.0 ml. The results of in vivo studies in five volunteers demonstrated that the gallbladder contracted substantially after a fatty meal and that volumes calculated by the ellipsoid and sum-of-cylinders methods were nearly identical. Thus, a simple ellipsoid method, requiring negligible time, may be used to approximate satisfactory gallbladder volume for clinical or investigative studies.

Gallbladder↗

PubMed1984

Computerized analysis of spike-burst activity of the upper gastrointestinal tract.

Although the electrical recording of spike-burst activity is a well-established technique, the visual-manual analysis of the electrical tracings is laborious and time consuming. Current automated methods for analyzing upper gastrointestinal spike-burst activity involve the use of computer systems capable of storing large quantities of data. We describe herein an automated system for counting myoelectrical spike bursts that provides online detection of spike bursts using a laboratory computer. Because only the parameters that describe each burst are stored, only a minimal amount of computer memory is required. Subsequent analysis of stored information yields tabular or graphical output of data. Results of the computer analysis are comparable with those obtained by visual-manual assessment.

Animals↗

PubMed1983

Data base management system for tracking occupational health.

An Occupational Health Information System (OHIS), a data base management system for tracking occupational health, has been developed. A primary feature is its ability to correlate employee workplace environment with health. Hardware implementation of OHIS is on a minicomputer with application programs written in ANSI standard MUMPS language. OHIS integrates personnel, medical and industrial hygiene/toxicology information into one data base. The personnel module is comprised of demographic information collected and updated by the personnel department. The medical module utilizes an interactive video display terminal (VDT)-driven questionnaire and multiphasic testing subsystems which are accessed selectively by authorized users. The backbone of OHIS is a parameter dictionary of all possible data elements. A final medical report includes a medical history summary, physical findings and X-ray interpretation, highlighted and normal test findings, computer interpretations, and a final one-page summary of problem and health-risk information. Information characterizing the workplace environment is captured and reported by the questionnaire subsystem. This questionnaire is designed to define: 1) monitoring conditions, 2) sample analysis, 3) measurement results, and 4) personal protective equipment used. These data provide a means of assigning environmental exposure measurements to appropriate employees.

Adult↗